Carex richardsonii R. Br.
Richardson's sedge
Cyperaceae (Sedge family)

Introduction to Vascular Plants

Photograph

© Bryan Kelly-McArthur     (Photo ID #74466)


Map

E-Flora BC Static Map

Distribution of Carex richardsonii
Click here to view the full interactive map and legend

Species Information

General:
Perennial, loosely tufted herb from long rhizomes; stems 10-25 cm tall, rough above, about equalling the leaves.
Leaves:
Sheaths brownish, the lower ones bladeless and breaking into threads; blades 6 to 9 per stem, mostly basal, flat or somewhat channeled, gradually tapering to the tips, 2-2.5 mm wide.
Flowers:
Spikes 2 to 4, the terminal one stalked, linear, 12-20 mm long, with male flowers, the lower spikes 1 to 3, linear, 10-20 mm long, the female flowers short-stalked, erect; bracts subtending the female spikes reduced to bladeless sheaths, up to 1 cm long.
Fruits:
Perigynia egg-shaped, 2.5-3.5 mm long, 1-1.5 mm wide, straw-coloured or brownish, obscurely 3-angled, appressed short-hairy, crowded, erect, short-stalked, the beaks bidentate, about 0.5 mm long or less; female scales broadly egg-shaped, dark purplish, with translucent margins, longer than the perigynia; stigmas 3; achenes 3-angled, 1.7-2 mm long.

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Ecology

Ecological Framework for Carex richardsonii

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Avg

Min

Max

Elevation (metres)
1121 230 2080
Slope Gradient (%)
15 0 100

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

224 0 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 1 6
Modal Nutrient Regime
Class
C
# of field plots
 species was recorded in:
337
Modal BEC Zone Class
IDF

All BEC Zones (# of stations/zone) species was recorded in

AT(2), BG(2), BWBS(7), CWH(1), ESSF(10), ICH(8), IDF(124), MS(44), SBPS(101), SBS(21), SWB(4)

Habitat and Range

Dry rocky slopes and forests in the montane zone; common in C and SC BC (Cariboo region); E to PQ and S to VT, PA, OH, IN, IL, IO, SD and WY.

SourceThe Illustrated Flora of British Columbia